Description : Which theory states that the light wave behaves as if it consists of many tiny particles? ∙ a. Huygen’s theory ∙ b. Wave theory of light ∙ c. Nyquist theory ∙ d. Quantum theory
Last Answer : ∙ d. Quantum theory
Description : Founded the wave theory of light a. Francesco Grimaldi b. Edward Appleton c. James Clerk Maxwell d. Christian Huygens
Last Answer : d. Christian Huygens
Description : Any small element of space in the path of a wave may be considered as a source of secondary wavelet. A. De Morgan’s Principle B. Faraday’s Law C. Huygen’s Principle D. Fresnel’s Law of optics
Last Answer : C. Huygen’s Principle
Description : “Each point on a spherical wavefront may be considered a source of secondary spherical wavefronts”. This is known as the A. Snell’s law B. D’Alembert’s principle C. Appleton’s theory D. Huygen’s principle
Last Answer : D. Huygen’s principle
Description : The theory which ascribes wave-like properties to particles is called: w) general relativity x) quantum mechanics y) special relativity z) classical mechanics
Last Answer : ANSWER: X -- QUANTUM MECHANICS
Description : What do you call the reflection of a part of incident light at the interface of two media that have different refractive indices? A. Snell’s reflection B. Fresnel reflection C. Lambertian reflection D. Huygen’s reflection
Last Answer : B. Fresnel reflection
Description : Whose principle or law states that each point on a wavefront may be considered a new wave source? Is it: w) Snell's Law x) Huygen's Principle y) Young's Law z) Hertz's Law.
Last Answer : ANSWER: X -- HUYGEN'S PRINCIPLE
Description : What theorem sets a limit on the maximum capacity of a channel with a given noise level? A. Nyquist theorem B. Hartley law C. Shannon-Hartley theorem D. Shannon theorem
Last Answer : C. Shannon-Hartley theorem
Description : ______ sets the limit on the maximum capacity of a channel with a given noise level. A. Hartley theorem B. Shannon-hartley theorem C. Nyquist theorem D. Shannon theorem
Last Answer : B. Shannon-hartley theorem
Description : ________ sets a limit on the maximum capacity of a channel with a give noise level. A. Hartley theorem B. Shannon-Hartley theorem C. Nyquist theorem D. Shannon theorem
Last Answer : B. Shannon-Hartley theorem
Description : ECE Board Exam March 1996 According to the Nyquist theorem, the sampling rate that can be used in a PCM system is ________ the highest audio frequency. A. once B. eight times C. twice D. thrice
Last Answer : C. twice
Description : Light traveling in optical fiber follows which of the following principles. ∙ a. Huygen’s principle ∙ b. Reflection theory ∙ c. Light theory ∙ d. Snell’s law
Last Answer : d. Snell’s law
Description : (2) Exclusion Principle of Pauli Explanation: The Pauli exclusion principle is the quantum mechanical principle that no two identical fermions (particles with half-integer spin) may occupy the same ... function for two identical fermions is anti-symmetric with respect to exchange of the particles.
Last Answer : The three elements most needed in common fertilizers are – (1) Sulphur, Phosphorous and Sodium (2) Nitrogen, Phosphorous and Sodium (3) Phosphorous, Sodium and Nitrogen (4) Calcium, Phosphorous and Potassium
Description : I think it's very sweet when they eat bread, especially when they eat it in bed. 333
Last Answer : I haven't seen one before. Is there a video somewhere like this?
Description : An electromagnetic wave consists of A. a magnetic field only B. both electric and magnetic fields C. an electric field only D. non-magnetic field only
Last Answer : B. both electric and magnetic fields
Description : A type of array antenna which consists of one half-wave driven dipole, one reflector and one director A. Hertzian dipole B. Yagi-uda C. Broadside collinear D. Log periodic dipole array
Last Answer : B. Yagi-uda
Description : Which of the following statements is not one of the three basic assumptions of the kinetic theory? w) Matter is composed of very tiny particles. x) The particles of matter are in constant motion. y) The particles of matter lose energy in collisions.
Last Answer : ANSWER: Y -- THE PARTICLES OF MATTER LOSE ENERGY IN COLLOSIONS
Description : _____ is the amount of uncertainty in a system of symbols A. Bandwidth B. Enthalpy C. Entropy D. Quantum
Last Answer : C. Entropy
Description : A quarter wave line open circuited at far end behaves as: (1) Inductance (2) L and C in parallel (3) Capacitance (4) L and C in series
Last Answer : A quarter wave line open circuited at far end behaves as: L and C in series.
Description : What is the quantum theory of light?
Last Answer : transition of a charged particle between energy levels.
Description : The quantum theory of light was given by – (1) Einstein (2) Plank (3) Newton (4) Faraday
Last Answer : (2) Plank Explanation: The Quantum theory of light was first discovered by Max Planck. In 1900, Planck, attempting to explain body radiation suggested that although light was a wave.
Description : The main benefit of light-wave communications over microwaves or any other communications media is a. Lower cost b. Better security c. Wider bandwidth d. Freedom from interference
Last Answer : c. Wider bandwidth
Description : What is the term for the ratio of actual velocity at which a signal travels through a line to the speed of light in a vacuum? A. Velocity factor B. Characteristic impedance C. Surge impedance D. Standing wave ratio
Last Answer : A. Velocity factor
Description : What is the meaning of the term velocity factor of a transmission line? A. The ratio of the characteristic impedance of the line to the terminating impedance B. The index of shielding for coaxial ... The velocity of the wave on the transmission line divided by the velocity of light in a vacuum.
Last Answer : D. The velocity of the wave on the transmission line divided by the velocity of light in a vacuum.
Description : What is the meaning of the term velocity factor of a transmission line? A. The index of shielding for coaxial cable B. The velocity of the wave on the transmission line multiplied by the velocity of ... The velocity of the wave on the transmission line divided by the velocity of light in a vacuum
Last Answer : D. The velocity of the wave on the transmission line divided by the velocity of light in a vacuum
Description : How do quantum entangled particles achieve spooky action at a distance?
Last Answer : answer:How it works your guess is as good as mine. But to suppose that it does work is profound on many levels. To hypothesize, the Superdense coding made possible through entanglement may indeed ... s almost like redefining the word cloning in order to put forth an embryonic stem cell agenda.
Description : The third law of thermodynamics states that the (A) Heat capacity of a crystalline solid is zero at absolute zero temperature (B) Heat transfer from low temperature to high temperature source is ... without external work (C) Gases having same reduced properties behaves similarly (D) None of these
Last Answer : (A) Heat capacity of a crystalline solid is zero at absolute zero temperature
Description : What are tiny particles of protons and neutrons ?
Last Answer : Atomic particles. The reason is that when an atom is broken, that substance has no other properties , that is, the substance of which the atom is broken , then that substance no longer exists ... of any element. Electrons , protons , neutrons are considered to be the three main elemental particles.
Description : Why a few tiny particles bounced backwards off the foil?
Last Answer : Feel Free to Answer
Description : All matter is made up of tiny particles called?
Last Answer : Atoms
Description : All matter, both living and nonliving, is made up of tiny particles called _______.?
Description : A Hertz antenna is operating on a frequency of 2182 kHz and consists of a horizontal wire that is hanged between two towers. What is the frequency of its third harmonic? A. 727 kHz B. 6546 kHz C. 436 kHz D. 6.546 kHz
Last Answer : B. 6546 kHz
Description : The front-end of a television receiver, having a bandwidth of 7Mhz, and operating at a temperature of 27˚C , consists of an amplifier having a gain of 15 followed by a mixer whose gain is 20. The ... equivalent noise resistance for this television receiver. A. 8760 Ω B. 875Ω C. 8.76Ω D. 0.876Ω
Last Answer : B. 875Ω
Description : What consists the front-end circuit of a VHF TV superheterodyne receiver? A. Mixer, RF amplifier and AFC? B. RF amplifier, Band pass filter and mixer C. Local oscillator, mixer and RF amplifier D. Local oscillator, AGC and antenna
Last Answer : C. Local oscillator, mixer and RF amplifier
Description : It consists of a number of dipoles of equal size, equally spaced along a straight line with all dipoles fed in the same phase from the same source. A. Log-periodic antenna B. Yagi antenna C. End-fire array D. Broadside array
Last Answer : D. Broadside array
Description : in 1656 Christian Huygens invented what type of timekeeper?
Last Answer : Pendulum clock
Description : What type of clock was invented in 1656 by Christian Huygens?
Last Answer : The pendulum clock
Description : The Huygens telescope eye piece (A) Is aplanatic (B) Achromatic (C) Both (a) and (b) (D) Neither (a) nor (b)
Last Answer : (C) Both (a) and (b)
Description : here are two types of diffraction Fresnel and __________. A. Michelson B. De Broglie C. Fraunhofer D. Huygens
Last Answer : C. Fraunhofer
Description : The phenomenon of diffraction can be understood using A. Huygens principle B. Fraunhofer C. Uncertainty principle D. Fresnel
Last Answer : A. Huygens principle
Description : Who invented aeroplane ? (1) Orville Wright and Wilbur Wright (2) Sir Frank Whittle (3) Michael Faraday (4) Christian Huygens
Last Answer : Orville Wright and Wilbur Wright
Description : in 1656 Christian Huygens invented what type of timekeeper
Description : The Nyquist theorem specifies the minimum samplingrate to be_______. A) equal to the lowest frequency of asignal B) equal to the highest frequency ofa signal C) twice thebandwidth of a signal D) twice thehighest frequencyof a signal
Last Answer : twice thehighest frequencyof a signal
Description : If the frequency spectrum of a signal has a bandwidth of500 Hz with thehighest frequency at 600 Hz, what shouldbe the samplingrate, according to the Nyquist theorem? A) 200 samples/s B) 500 samples/s C) 1000 samples/s D) 1200 samples/s
Last Answer : 1200 samples/s
Description : For a ______ channel, the Nyquist bit rate formula defines thetheoretical maximum bit rate. A) noisy B) noiseless C) bandpass D) low-pass
Last Answer : noiseless
Description : Classify data networks. Explain with the help of Nyquist theorem, the data rate limitations in PSTN’s. Give an account of modems used in data transfer. Explain their importance and list some of the V-series recommendations.
Last Answer : Classifications of Data Network: Data Networks are classified according to their geographical coverage: Wide area networks (WANs) Metropolitan area networks(MANs) Local area ... V.53 Limits for the maintenance of telephone type circuits used for data transmission.
Description : As per Nyquist criterion the sampling rate is (A) 2fs (B) (1/2)fs (C) (1/2fs) (D) (2/fs) Where fs is the signal frequency
Last Answer : (A) 2fs
Description : State sampling theorem. Define Nyquist rate.
Last Answer : SAMPLING THEOREM: Sampling theorem states that a band-limited signal of finite energy having the highest frequency component fm Hz can be represented and recovered completely from a set of samples taken ... frequency should be equal to or greater than twice the maximum signal frequency (fs≥ 2fm)
Description : The analog signal m(t) is given below m(t) = 4 cos 100 pt + 8 sin 200 pt + cos 300 pt, the Nyquist sampling rate will be: (1) 1/100 (2) 1/200 (3) 1/300 (4) 1/600
Last Answer : The analog signal m(t) is given below m(t) = 4 cos 100 pt + 8 sin 200 pt + cos 300 pt, the Nyquist sampling rate will be: 1/300